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SIGNATURE GEORGE C. BOWEN
TITLE TREASURER
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
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WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
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<PER-SHARE-DISTRIBUTIONS> 1.50
<RETURNS-OF-CAPITAL> 0.00
<PER-SHARE-NAV-END> 39.05
<EXPENSE-RATIO> 1.63
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0.00
</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 823483
<NAME> Oppenheimer Main Street Income & Growth Fund - C
<SERIES>
<NUMBER> 2
<NAME> Oppenheimer Main Street Funds, Inc
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> AUG-31-1999
<PERIOD-START> SEP-01-1998
<PERIOD-END> FEB-28-1999
<INVESTMENTS-AT-COST> 10,657,407,305
<INVESTMENTS-AT-VALUE> 13,880,015,901
<RECEIVABLES> 296,118,061
<ASSETS-OTHER> 207,461
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 14,176,341,423
<PAYABLE-FOR-SECURITIES> 7,011,064
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 23,900,782
<TOTAL-LIABILITIES> 30,911,846
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 10,187,529,988
<SHARES-COMMON-STOCK> 40,008,621
<SHARES-COMMON-PRIOR> 35,695,727
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 1,624,329
<ACCUMULATED-NET-GAINS> 736,910,921
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 3,222,612,997
<NET-ASSETS> 1,561,878,688
<DIVIDEND-INCOME> 68,688,581
<INTEREST-INCOME> 20,378,685
<OTHER-INCOME> 0
<EXPENSES-NET> 78,808,783
<NET-INVESTMENT-INCOME> 10,258,483
<REALIZED-GAINS-CURRENT> 745,564,061
<APPREC-INCREASE-CURRENT> 2,050,691,797
<NET-CHANGE-FROM-OPS> 2,806,514,341
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> 54,987,189
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 6,216,763
<NUMBER-OF-SHARES-REDEEMED> 3,303,340
<SHARES-REINVESTED> 1,399,471
<NET-CHANGE-IN-ASSETS> 3,846,359,666
<ACCUMULATED-NII-PRIOR> 7,487,787
<ACCUMULATED-GAINS-PRIOR> 486,700,405
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 28,385,959
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 78,846,555
<AVERAGE-NET-ASSETS> 1,390,283,000
<PER-SHARE-NAV-BEGIN> 32.07
<PER-SHARE-NII> (0.03)
<PER-SHARE-GAIN-APPREC> 8.50
<PER-SHARE-DIVIDEND> 0.00
<PER-SHARE-DISTRIBUTIONS> 1.50
<RETURNS-OF-CAPITAL> 0.00
<PER-SHARE-NAV-END> 39.04
<EXPENSE-RATIO> 1.63
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0.00
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 823483
<NAME> Oppenheimer Main Street Income & Growth Fund - Y
<SERIES>
<NUMBER> 2
<NAME> Oppenheimer Main Street Funds, Inc
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> AUG-31-1999
<PERIOD-START> SEP-01-1998
<PERIOD-END> FEB-28-1999
<INVESTMENTS-AT-COST> 10,657,407,305
<INVESTMENTS-AT-VALUE> 13,880,015,901
<RECEIVABLES> 296,118,061
<ASSETS-OTHER> 207,461
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 14,176,341,423
<PAYABLE-FOR-SECURITIES> 7,011,064
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 23,900,782
<TOTAL-LIABILITIES> 30,911,846
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 10,187,529,988
<SHARES-COMMON-STOCK> 2,416,473
<SHARES-COMMON-PRIOR> 1,638,791
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 1,624,329
<ACCUMULATED-NET-GAINS> 736,910,921
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 3,222,612,997
<NET-ASSETS> 95,243,703
<DIVIDEND-INCOME> 68,688,581
<INTEREST-INCOME> 20,378,685
<OTHER-INCOME> 0
<EXPENSES-NET> 78,808,783
<NET-INVESTMENT-INCOME> 10,258,483
<REALIZED-GAINS-CURRENT> 745,564,061
<APPREC-INCREASE-CURRENT> 2,050,691,797
<NET-CHANGE-FROM-OPS> 2,806,514,341
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 279,229
<DISTRIBUTIONS-OF-GAINS> 3,019,461
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 998,265
<NUMBER-OF-SHARES-REDEEMED> 309,232
<SHARES-REINVESTED> 88,649
<NET-CHANGE-IN-ASSETS> 3,846,359,666
<ACCUMULATED-NII-PRIOR> 7,487,787
<ACCUMULATED-GAINS-PRIOR> 486,700,405
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 28,385,959
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 78,846,555
<AVERAGE-NET-ASSETS> 75,747,000
<PER-SHARE-NAV-BEGIN> 32.38
<PER-SHARE-NII> 0.12
<PER-SHARE-GAIN-APPREC> 8.56
<PER-SHARE-DIVIDEND> 0.15
<PER-SHARE-DISTRIBUTIONS> 1.50
<RETURNS-OF-CAPITAL> 0.00
<PER-SHARE-NAV-END> 39.41
<EXPENSE-RATIO> 0.83
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0.00
</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 823483
<NAME> OPP. MAIN STREET CALIFORNIA MUNICIPAL FUND-A
<SERIES>
<NUMBER> 5
<NAME> OPPENHEIMER MAIN STREET FUNDS, INC.
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> AUG-31-1999
<PERIOD-START> SEP-01-1998
<PERIOD-END> FEB-28-1999
<INVESTMENTS-AT-COST> 135,053,593
<INVESTMENTS-AT-VALUE> 143,018,937
<RECEIVABLES> 1,828,646
<ASSETS-OTHER> 16,065
<OTHER-ITEMS-ASSETS> 741,386
<TOTAL-ASSETS> 145,605,034
<PAYABLE-FOR-SECURITIES> 3,967,678
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 476,293
<TOTAL-LIABILITIES> 4,443,971
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 133,217,598
<SHARES-COMMON-STOCK> 8,627,161
<SHARES-COMMON-PRIOR> 8,431,451
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 361,560
<ACCUMULATED-NET-GAINS> 392,533
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 7,912,492
<NET-ASSETS> 112,259,965
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 3,696,408
<OTHER-INCOME> 0
<EXPENSES-NET> 480,021
<NET-INVESTMENT-INCOME> 3,216,387
<REALIZED-GAINS-CURRENT> 394,282
<APPREC-INCREASE-CURRENT> (546,960)
<NET-CHANGE-FROM-OPS> 3,063,709
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 2,721,080
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 775,992
<NUMBER-OF-SHARES-REDEEMED> 715,311
<SHARES-REINVESTED> 135,029
<NET-CHANGE-IN-ASSETS> 8,175,188
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> (1,749)
<OVERDISTRIB-NII-PRIOR> 351,652
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 373,771
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 587,224
<AVERAGE-NET-ASSETS> 111,096,000
<PER-SHARE-NAV-BEGIN> 13.02
<PER-SHARE-NII> 0.32
<PER-SHARE-GAIN-APPREC> (0.01)
<PER-SHARE-DIVIDEND> 0.32
<PER-SHARE-DISTRIBUTIONS> 0.00
<RETURNS-OF-CAPITAL> 0.00
<PER-SHARE-NAV-END> 13.01
<EXPENSE-RATIO> 0.52
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0.00
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 823483
<NAME> OPP. MAIN STREET CALIFORNIA MUNICIPAL FUND-B
<SERIES>
<NUMBER> 5
<NAME> OPPENHEIMER MAIN STREET FUNDS, INC.
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> AUG-31-1999
<PERIOD-START> SEP-01-1998
<PERIOD-END> FEB-28-1999
<INVESTMENTS-AT-COST> 135,053,593
<INVESTMENTS-AT-VALUE> 143,018,937
<RECEIVABLES> 1,828,646
<ASSETS-OTHER> 16,065
<OTHER-ITEMS-ASSETS> 741,386
<TOTAL-ASSETS> 145,605,034
<PAYABLE-FOR-SECURITIES> 3,967,678
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 476,293
<TOTAL-LIABILITIES> 4,443,971
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 133,217,598
<SHARES-COMMON-STOCK> 2,224,080
<SHARES-COMMON-PRIOR> 1,781,698
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 361,560
<ACCUMULATED-NET-GAINS> 392,533
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 7,912,492
<NET-ASSETS> 28,901,098
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 3,696,408
<OTHER-INCOME> 0
<EXPENSES-NET> 480,021
<NET-INVESTMENT-INCOME> 3,216,387
<REALIZED-GAINS-CURRENT> 394,282
<APPREC-INCREASE-CURRENT> (546,960)
<NET-CHANGE-FROM-OPS> 3,063,709
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 505,215
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 567,498
<NUMBER-OF-SHARES-REDEEMED> 150,583
<SHARES-REINVESTED> 25,467
<NET-CHANGE-IN-ASSETS> 8,175,188
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> (1,749)
<OVERDISTRIB-NII-PRIOR> 351,652
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 373,771
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 587,224
<AVERAGE-NET-ASSETS> 26,002,000
<PER-SHARE-NAV-BEGIN> 13.01
<PER-SHARE-NII> 0.26
<PER-SHARE-GAIN-APPREC> (0.02)
<PER-SHARE-DIVIDEND> 0.26
<PER-SHARE-DISTRIBUTIONS> 0.00
<RETURNS-OF-CAPITAL> 0.00
<PER-SHARE-NAV-END> 12.99
<EXPENSE-RATIO> 1.52
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0.00
</TABLE>
On December 22, 1998, Oppenheimer Main Street Income & Growth Fund changed its
name to Oppenheimer Main Street Growth & Income Fund.